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Motion Of Bodies In Contact MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

Quick Facts

  • Motion of Block in Contact is considered one the most difficult concept.

  • 7 Questions around this concept.

Solve by difficulty

A block of mass m is connected to another block of mass  by a spring ( massless ) of spring constant  K . The blocks are kept on a smooth horizontal plane.Initially the blocks are at rest and the spring is unstretched   Then a constant force  starts acting on the block of mass  to pull it. Find the force of the block of mass  m.

 

Three blocks A, B and C, of masses 4 kg, 2 kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4 kg block, then the contact force between A and B is:

 

Concepts Covered - 1

Motion of Block in Contact

 Use Fnet =maa=Fnet m1+m2

  1. When 2 Blocks are in Contact

            

     

 

Ff=m1af=m2aa=Fm1+m2f=m2Fm1+m2

  1. When 3 Blocks are in Contact

         

 Use Fnet=ma


a=Fm1+m2+m3


f1=(m2+m3)Fm1+m2+m3f2=m3Fm1+m2+m3
 

 

 

 

 

 

 

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Motion of Block in Contact

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